Daily Practice · GCSE Computer Science
September 2023 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in September 2023, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in September 2023
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 2023State the difference between lossy and lossless compression.
- 2nd September 2023State the condition that must be met before a binary search can be used on an array.
- 3rd September 2023A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 4th September 2023Convert the hexadecimal number FF to an 8-bit binary number.
- 5th September 2023Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 6th September 2023State why a program written in a high level language must be translated.
- 7th September 2023Convert the denary number 45 to hexadecimal.
- 8th September 2023What does the acronym CPU stand for?
- 9th September 2023State what the term malware means.
- 10th September 2023Describe what a nested loop does when it processes a 2D array.
- 11th September 2023An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
- 12th September 2023Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 13th September 2023Which piece of UK legislation controls how organisations must store and use people's personal data?
- 14th September 2023Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 15th September 2023State the correct order of the three operations used to read data from a text file.
- 16th September 2023Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 17th September 2023Give two reasons why network communication is divided into layers.
- 18th September 2023A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 19th September 2023A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
- 20th September 2023State one function carried out by the operating system of a computer.
- 21st September 2023In computational thinking, what is meant by the term 'decomposition'?
- 22nd September 2023Given A = 1 and B = 1, state the value of A AND B.
- 23rd September 2023Convert the denary number 200 to hexadecimal, showing your working.
- 24th September 2023Define a peer-to-peer network.
- 25th September 2023Explain why an interpreter is often preferred while a program is being written.
- 26th September 2023Convert the denary number 5 to a 4-bit binary number.
- 27th September 2023A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 28th September 2023A simple cipher shifts every letter 2 places forward in the alphabet, wrapping around so Y becomes A and Z becomes B. Encrypt the plaintext CAT using this cipher.
- 29th September 2023A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
- 30th September 2023A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.